OurAirports has records for 4 different navaids with the identifier "SX". Please select the one you'd like to view.
Canada
368 KHz (SX ... -..-)
... -..-
China
391 KHz (SX ... -..-)
Tajikistan
505 KHz (SX ... -..-)
U.S. Virgin Islands
241 KHz (SX ... -..-)